U.S. patent application number 10/862787 was filed with the patent office on 2005-12-08 for top drive systems.
Invention is credited to Folk, Robert Alden, Folk, Steven Lorne.
Application Number | 20050269104 10/862787 |
Document ID | / |
Family ID | 35446442 |
Filed Date | 2005-12-08 |
United States Patent
Application |
20050269104 |
Kind Code |
A1 |
Folk, Robert Alden ; et
al. |
December 8, 2005 |
Top drive systems
Abstract
A top drive system for wellbore operations including a hollow
bore alternating current permanent magnet motor with a motor bore
therethrough, a planetary gear system coupled to the motor, the
gear system having a gear system bore therethrough, a quill
drivingly connected to the planetary gear system and rotatable
thereby to rotate a tubular member located below the quill, the
motor adjacent the gear system, the motor bore aligned with the
gear system bore so that fluid is flowable through the top drive
system from the top of the motor to the bottom of the planetary
gear system and into and through the quill.
Inventors: |
Folk, Robert Alden;
(Calgary, CA) ; Folk, Steven Lorne; (Sherwood
Park, CA) |
Correspondence
Address: |
Guy McClung
PMB 347
16690 Champion Forest Drive
Spring
TX
77379-7023
US
|
Family ID: |
35446442 |
Appl. No.: |
10/862787 |
Filed: |
June 7, 2004 |
Current U.S.
Class: |
166/379 ;
166/77.1; 166/78.1; 166/85.1 |
Current CPC
Class: |
E21B 19/16 20130101;
E21B 19/08 20130101; E21B 19/164 20130101 |
Class at
Publication: |
166/379 ;
166/077.1; 166/078.1; 166/085.1 |
International
Class: |
E21B 019/22 |
Claims
What is claimed is:
1. A drive system comprising a permanent magnet motor with a first
motor side, a second motor side, and a motor bore therethrough from
the first motor side to the second motor side, the permanent magnet
motor comprising a hollow bore alternating current permanent magnet
motor, a planetary gear system coupled to the permanent magnet
motor, the planetary gear system having a first gear side
spaced-apart from the first motor side, a second gear side
spaced-apart from the first gear side, and a gear system bore
therethrough from the first gear side to the second gear side, the
second motor side adjacent the first gear side, the motor bore
aligned with the gear system bore so that fluid is flowable through
the drive system from the first motor side of the motor to the
second gear side of the planetary gear system.
2. A top drive system for wellbore operations, the top drive system
comprising a permanent magnet motor with a top, a bottom, and a
motor bore therethrough from the top to the bottom, the permanent
magnet motor comprising a hollow bore alternating current permanent
magnet motor, a planetary gear system coupled to the permanent
magnet motor, the planetary gear system having a top, a bottom, and
a gear system bore therethrough from top to bottom, the bottom of
the permanent magnet motor adjacent the top of the planetary gear
system, the motor bore aligned with the gear system bore so that
fluid is flowable through the top drive system from the top of the
motor to the bottom of the planetary gear system, and a quill
drivingly connected to the planetary gear system and rotatable
thereby to rotate a tubular member located below the quill, the
quill having a top end and a bottom end, the quill, permanent
magnet motor, and planetary gear system comprising a top drive.
3. The top drive system of claim 2 further comprising a support
system for supporting the permanent magnet motor and the planetary
gear system, the support system comprising a swivel body below the
planetary gear system, a suspension member above the permanent
magnet motor, two spaced-apart links each with an upper end and a
lower end, the swivel body having two spaced-apart holes, each one
for receiving a lower end of one of the two supporting links, and
each upper end of one of the two spaced-apart links connected to
the suspension member.
4. The top drive system of claim 2 further comprising a spacer
plate below and supporting the planetary gear system, the spacer
plate having a bearing recess, and a bearing in the bearing recess
for facilitating rotation of the quill.
5. The top drive system of claim 3 wherein each of the two
spaced-apart holes for receiving a lower end of a link is
non-circular in shape as viewed from above.
6. The top drive system of claim 3 wherein the suspension member
includes a block becket apparatus, the block becket apparatus
including a travelling block and a becket, the becket releasably
and directly connected to the traveling block, the becket
releasably connectible to the two spaced-apart links.
7. The top drive system of claim 6 wherein the becket is
selectively securable to the travelling block in a plurality of
positions.
8. The top drive system of claim 3 further comprising a
counterbalance system for compensating for system weight during
tubular stabbing to inhibit damage to tubulars, the counterbalance
system comprising two load compensators, each load compensator
connected at a first end to one of the two spaced-apart links and
at a second end to the swivel body.
9. The top drive system of claim 3 further comprising the swivel
body having a swivel body interior, a main bearing disposed within
the swivel body interior, the quill having a quill flange, the
quill flange resting on and movable over the main bearing.
10. The top drive system of claim 3 further comprising a load
sleeve having a sleeve top and a sleeve bottom, the sleeve top
connected to the swivel body, the sleeve bottom having a sleeve
bottom portion, a load collar positioned around the load sleeve and
supported by the sleeve bottom portion, two lower links, the two
lower links supported by the load collar, elevator apparatus for
selectively receiving and holding a tubular, the elevator apparatus
supported by the two lower links.
11. The top drive system of claim 10 further comprising link tilt
apparatus connected to the two lower links and to the load collar
for tilting the two lower links away from a central line extending
down through a center of the permanent magnet through a center of
the planetary gear system, through a center of the quill, said
centers aligned.
12. The top drive system of claim 3 further comprising a mud saver
system releasably connected to the quill.
13. The top drive system of claim 12 further comprising a saver sub
releasably connected to and below the mud saver system.
14. The top drive system of claim 11 further comprising a mud saver
system releasably connected to the bottom end of the quill, a saver
sub releasably connected to and below the mud saver system, the mud
saver system having a central longitudinal axis from a top to a
bottom thereof, and a mud saver bore therethrough from top to
bottom, the saver sub having a central longitudinal axis from a top
to a bottom thereof, and a saver sub bore therethrough from top to
bottom, the quill having a central longitudinal axis and a quill
bore therethrough from the top end to the bottom end, the central
longitudinal axis of the mud saver system of the saver sub and of
the quill aligned with the center line, and the quill bore in fluid
communication with the mud saver bore and the mud saver bore in
fluid communication with the saver sub bore so that drilling fluid
is passable through the quill to the mud saver system, to the saver
sub, and out from the saver sub.
15. The top drive system of claim 10 further comprising a clamping
system connected to the load collar and movable up and down beneath
and with respect to the load collar, the clamping system for
selectively clamping an item, and the clamping system disposed
between the two lower links.
16. The top drive system of claim 15 wherein the clamping system
comprises a main body, two opposed clamping apparatuses in the main
body, the two opposed clamping apparatuses spaced-apart for
selective receipt therebetween of a member to be clamped
therebetweeen, each of the two opposed clamping apparatuses having
a mount and a piston movable within the mount, the piston
selectively movable toward and away from a member to be clamped,
two spaced-apart legs, each leg with an upper end and a lower end,
each lower end connected to the main body, each leg comprising an
outer leg portion and an inner leg portion, the inner leg portion
having part thereof movable within the outer leg portion to provide
a range of up/down movement for the main body.
17. The top drive of claim 16 further comprising each mount having
a liner channel for a liner, a liner in each mount for facilitating
piston movement, each piston movable in said liner, and each liner
removably disposed in a corresponding liner channel.
18. The top drive system of claim 15 wherein clamping system
support apparatus connects the clamping system to the load collar
and the top drive system further comprising electrical power
generating apparatus connected to the clamping system support
apparatus for providing electrical power to at least one apparatus
located below the load collar.
19. The top drive system of claim 17 further comprising a lower
hydraulic manifold connected to the clamping system support
apparatus, a plurality of directional control valves on the lower
hydraulic manifold for control hydraulic fluid flow in a plurality
of corresponding flow lines, the plurality of corresponding flow
lines including flow lines for providing hydraulic fluid to power
apparatus below the clamping system.
20. The top drive system of claim 15 further comprising a selective
locking mechanism secured to the swivel body for selectively
locking the clamping system preventing its rotation while the quill
is allowed to rotate.
21. The top drive system of claim 18 wherein the load sleeve has
fluid conducting channels and the top drive system further
comprising a rotating head connected to the load sleeve for
receiving fluid from the load sleeve's fluid conducting channels
and for conveying said fluid to the lower hydraulic manifold, and
the rotating head rotatable with the clamping system.
22. The top drive system of claim 2 further comprising an access
platform pivotably connected at a lower end to the swivel body, the
access platform with a platform portion pivotable to a generally
horizontal position so that personnel on the access platform can
access components of the top drive system.
23. The top drive system of claim 2 further comprising an extension
system connected to the top drive for moving the top drive
horizontally.
24. The top drive system of claim 23 wherein the extension system
has an opening through which a tubular stand is movable while the
extension system with the top drive connected thereto moves with
respect to the tubular stand.
25. The top drive system of claim 14 wherein first connection
locking apparatus locks the quill to the mud saver system, and
second connection locking apparatus locks the mud saver system to
the saver sub.
26. The top drive of claim 11 wherein the two lower links comprise
a first link and a second link, the link tilt apparatus including a
clamp on each of the first link and the second link, each clamp
having two roller pins between which a portion of the corresponding
link is movable to facilitate movement of the links with respect to
the clamps.
27. The top drive of claim 26 wherein each roller is mounted with
mounting plates having offset holes for mounting the roller pins so
that reversing the mounting plates changes the distance between the
roller pins to accommodate links of different widths.
28. A top drive system comprising a drive motor, a gear system
coupled to the drive motor, a drive quill coupled to the gear
system, a top drive support, system for supporting the drive motor,
the gear system, and the drive quill, a lower support apparatus
connected to the top drive support system, tubular handling
apparatus connected to and supported by the lower support
apparatus, the tubular handling apparatus including
hydraulic-fluid-powered apparatus, provision apparatus for
providing hydraulic fluid to power the hydraulic-fluid-powered
apparatus, the provision apparatus including flow line apparatus
for providing hydraulic fluid to the hydraulic-fluid-powered
apparatus and electrically-operable control apparatus for
controlling fluid flow to and from the flow line apparatus, and
electrical power generating apparatus connected to the tubular
handling apparatus for providing electrical power to the
electrically-operable control apparatus.
29. An apparatus for releasably holding a member, the apparatus
comprising a main body, two opposed clamping apparatuses in the
main body, the two opposed clamping apparatuses spaced-apart for
selective receipt therebetween of a member to be clamped
therebetweeen, each of the two opposed clamping apparatuses having
a mount and a piston movable within the mount, the piston
selectively movable toward and away from a member to be clamped,
two spaced-apart legs, each leg with an upper end and a lower end,
each lower end connected to the main body, and each leg comprising
an outer leg portion and an inner leg portion, the inner leg
portion having part thereof movable within the outer leg portion to
provide a range of up/down movement for the main body.
30. A containerized top drive system comprising a container, top
drive apparatus removably disposed within the container, an
extension system for moving the top drive apparatus generally
horizontally within a derrick, the top drive apparatus secured to
the extension system, the extension system removably disposed
within the container with the top drive apparatus, a track, the
track comprised of multiple track parts connectible together, the
track including at least one track part which is a skid track part,
the skid track part comprising a skid portion and a track portion,
the top drive apparatus and the extension system located on the at
least one skid track part within the container and the top drive
apparatus supported by and movable with the at least one skid track
part, at least one first compartment for removably storing the
multiple track parts, the multiple track parts removably located in
the at least one first compartment, and the track assembleable
outside the container to include the multiple track parts and the
at least one skid track part so that the extension system is
movable along the track with the top drive apparatus.
Description
DESCRIPTION OF RELATED ART
[0001] The prior art discloses a variety of top drive systems which
use a DC or AC motor.
[0002] U.S. Pat. Nos. 4,458,768; 5,433,279; 6,276,450; 4,813,493;
6,705,405; 4,800,968; 4,878,546; 4,872,577; 4,753,300; 6,536,520;
6,679,333 disclose various top drive systems.
[0003] The prior art discloses a Varco Drilling Systems Model
TDS-9S AC Top Drive system which has an alternating current
motor-powered top drive.
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
[0004] This invention is directed to top drive systems for use in
wellbore rigs, to components of such systems, and to methods of
their use.
SUMMARY OF THE PRESENT INVENTION
[0005] The present invention, in certain aspects, provides a top
drive system with a hollowbore electric alternating current
permanent magnet motor coupled to a planetary gear system. The
central axis of the electric motor and of the planetary gear system
are aligned and can be selectively aligned with a wellbore.
[0006] In certain aspects, the electric motor has a central bore
that is alignable with a central bore of the planetary gear system
so that drilling fluid is flowable through the motor, through the
planetary gear system, through apparatus located below the
planetary gear system, and then into a tubular below or supported
by the top drive system.
[0007] In certain aspects, the top drive system includes pipe
handling apparatus located below the gear system. In one aspect an
electric power generator is located at the level of the pipe
handler apparatus and the electrical power generator rotates with
the pipe handling apparatus.
[0008] The present invention discloses, in certain embodiments, a
drive system with a permanent magnet motor with a first motor side,
a second motor side, and a motor bore therethrough from the first
motor side to the second motor side, wherein the permanent magnet
motor is a hollow bore alternating current permanent magnet motor;
a planetary gear system coupled to the permanent magnet motor, the
planetary gear system having a first gear side spaced-apart from
the first motor side, a second gear side spaced-apart from the
first gear side, and a gear system bore therethrough from the first
gear side to the second gear side, the second motor side adjacent
the first gear side; and the motor bore aligned with the gear
system bore so that fluid is flowable through the drive system from
the first motor side of the motor to the second gear side of the
planetary gear system; and, in certain aspects, with a hollow drive
shaft coupled to the gear system with fluid also flowable from the
gear system to and then out of the drive shaft.
[0009] The present invention discloses, in certain embodiments, a
top drive system for wellbore operations, the top drive system with
a permanent magnet motor with a top, a bottom, and a motor bore
therethrough from the top to the bottom, the permanent magnet motor
being a hollow bore alternating current permanent magnet motor; a
planetary gear system coupled to the permanent magnet motor, the
planetary gear system having a top, a bottom, and a gear system
bore therethrough from top to bottom, the bottom of the permanent
magnet motor adjacent the top of the planetary gear system; the
motor bore aligned with the gear system bore so that fluid is
flowable through the top drive system from the top of the motor to
the bottom of the planetary gear system; and a quill drivingly
connected to the planetary gear system and rotatable thereby to
rotate a tubular member located below the quill, the quill having a
top end and a bottom end, fluid flowable through the permanent
magnet motor, through the planetary gear system and through the
quill to exit a bottom end of the quill.
[0010] The present invention discloses, in certain embodiments, a
top drive system with a drive motor; a gear system coupled to the
drive motor; a drive quill coupled to the gear system; a top drive
support system for supporting the drive motor, the gear system, and
the drive quill; a lower support apparatus connected to the top
drive support system; tubular handling apparatus connected to and
supported by the lower support apparatus; the tubular handling
apparatus including hydraulic-fluid-powered apparatus; provision
apparatus for providing hydraulic fluid to power the
hydraulic-fluid-powered apparatus, the provision apparatus
including flow line apparatus for providing hydraulic fluid to the
hydraulic-fluid-powered apparatus and electrically-operable control
apparatus for controlling fluid flow to and from the flow line
apparatus; and electrical power generating apparatus connected to
the tubular handling apparatus for providing electrical power to
the electrically-operable control apparatus.
[0011] The present invention discloses, in certain embodiments, an
apparatus for releasably holding a member (e.g. but not limited to
a tubular, casing tubing, or pipe), the clamping apparatus
including a main body; two opposed clamping apparatuses in the main
body, the two opposed clamping apparatuses spaced-apart for
selective receipt therebetween of a member to be clamped
therebetweeen; each of the two opposed clamping apparatuses having
a mount and a piston movable within the mount, the piston
selectively movable toward and away from a member to be clamped;
two spaced-apart legs, each leg with an upper end and a lower end,
each lower end connected to the main body; and each leg with an
outer leg portion and an inner leg portion, the inner leg portion
having part thereof movable within the outer leg portion to provide
a range of up/down movement for the main body.
[0012] The present invention discloses, in certain embodiments, a
container (e.g. but not limited to an ISO container) for a top
drive system and a containerized top drive system with a container;
top drive apparatus removably disposed within the container; an
extension system for moving the top drive apparatus generally
horizontally within a derrick, the top drive apparatus secured to
the extension system, the extension system removably disposed
within the container with the top drive apparatus; a track, the
track with of multiple track parts connectible together; the track
including at least one track part which is a skid track part, the
skid track part with a skid portion and a track portion, the top
drive apparatus and the extension system located on the at least
one skid track part within the container and the top drive
apparatus supported by and movable with the at least one skid track
part; at least one first compartment for removably storing the
multiple track parts, the multiple track parts removably located in
the at least one first compartment; and the track assembleable
outside the container to include the multiple track parts and the
at least one skid track part so that with the extension system on
the track the extension system is movable along the track with the
top drive apparatus.
[0013] It is, therefore, an object of at least certain preferred
embodiments of the present invention to provide:
[0014] New, useful, unique, efficient, non-obvious top drive
systems and methods of their use;
[0015] Such top drive systems with a hollow bore electric motor
whose bore is aligned with a bore of a planetary gear system for
the flow of drilling fluid through the motor and through the gear
system to and through a drive shaft or quill to a tubular or
tubular string below the top drive; and;
[0016] Such a top drive system with an electrical power generator
which is rotatable with pipe; handling apparatus.
[0017] The present invention recognizes and addresses the
previously-mentioned problems and long-felt needs and provides a
solution to those problems and a satisfactory meeting of those
needs in its various possible embodiments and equivalents thereof.
To one of skill in this art who has the benefits of this
invention's realizations, teachings, disclosures, and suggestions,
various purposes and advantages, will be appreciated from the
following description of preferred embodiments, given for the
purpose of disclosure, when taken in conjunction with the
accompanying drawings. The detail in these descriptions is not
intended to thwart this patent's object to claim this invention no
matter how others may later disguise, it by variations in form or
additions of further improvements.
DESCRIPTION OF THE DRAWINGS
[0018] A more particular description of embodiments of the
invention briefly summarized above may be had by references to the
embodiments which are shown in the drawings which form a part of
this specification. These drawings illustrate certain preferred
embodiments and are not to be used to improperly limit the scope of
the invention which may have other equally effective or equivalent
embodiments.
[0019] FIG. 1A is, a perspective view of a top drive system
according to the present invention. FIG. 1B is an exploded view of
the system of FIG. 1A. FIG. 1C is a front view in cross-section of
the system of FIG. 1A. FIG. 1D is a side view of the system of FIG.
1A. FIG. 1E is a top view of the system of FIG. 1A. FIG. 1F is a
front view of part of the system of FIG. 1A. FIG. 1G is a side view
of a quill for the system of FIG. 1A. FIG. 1H is a perspective view
of the quill of FIG. 1G. FIG. 1I is a cross-section view of an end
of the quill of FIG. 1G. FIGS. 1J and 1K are perspective views of a
load sleeve of the system of FIG. 1A. FIG. 1L is a cross-section
view of the load sleeve of FIG. 1J along line 1L-1L of FIG. 1M.
FIG. 1M is an end view of the load sleeve of FIG. 1L. FIGS. 1N and
1S are perspective views of a swivel body of the system of FIG. 1A.
FIG. 1O is a top view of the swivel body of FIG. 1N. FIG. 1P is a
cross-section view of the swivel body of FIG. 1N. FIG. 1Q is a
bottom view of the swivel body of FIG. 1N. FIG. 1R is a perspective
view, partially cutaway, of the swivel body of FIG. 1N.
[0020] FIG. 2A is a side view of a system according to the present
invention with a top drive according to the present invention. FIG.
2B is a top view of the system of FIG. 2A. FIG. 2C is a perspective
view of an extension system according to the present invention.
FIG. 2D shows the system of FIG. 2C extended. FIG. 2E is a top view
of the system of FIG. 2C. FIG. 2F is a side view of part of a beam
or torque tube of the system of FIG. 2A. FIG. 2G is a schematic
view of a system according to the present invention.
[0021] FIG. 3 is a schematic view of a control system according to
the present invention for a top drive according to the present
invention as, e.g., in FIG. 1A.
[0022] FIG. 4A is a perspective view of part of the system of FIG.
1A. FIG. 4B is a cross-section view of what is shown in FIG. 4A.
FIG. 4C is an exploded view of part of the system of FIG. 1A
including parts shown in FIG. 4A. FIG. 4D is an enlargement of a
gear system according to the present invention as shown in FIG.
4B.
[0023] FIG. 5A is a top perspective view of a gear collar of the
system of FIG. 1A. FIG. 5B is a bottom perspective view of the gear
collar of FIG. 5A. FIG. 5C is a top view of the gear collar of FIG.
5A. FIG. 5D is a front view of the gear collar of FIG. 5A.
[0024] FIG. 6A is a top perspective view of a load collar of the
system of FIG. 1A. FIG. 6B is a bottom perspective view of the load
collar of FIG. 6A. FIG. 6C is a front view of the load collar of
FIG. 6A. FIG. 6D is a top view of the load collar of FIG. 6A.
[0025] FIG. 7A is a cross-section view of parts of a locking
mechanism for the system of FIG. 1A. FIGS. 7B-7F are perspective
views of parts of the mechanism of FIG. 7A. FIG. 7B is a top view
and FIG. 7C is a bottom view.
[0026] FIG. 8A is a front view of clamping apparatus of the system
of FIG. 1A. FIG. 8B is a top cross-section view of the apparatus of
FIG. 8A. FIG. 8C is a perspective view, partially cutaway, of the
apparatus of FIG. 8A. FIG. 8D is a perspective view of an upper leg
of the apparatus of FIG. 8A. FIG. 8E is a front view of the leg of
FIG. 8D. FIG. 8F is a perspective view of an inner leg of the
apparatus of FIG. 8A. FIG. 8G is a perspective view, partially
cutaway, of clamping apparatus of the apparatus of FIG. 8A. FIG. 8H
is a perspective view of part of the apparatus of FIG. 8G. FIG. 8I
is a perspective view of part of the apparatus of FIG. 8G. FIG. 8J
is a top cross-section view of the apparatus of FIG. 8H. FIG. 8K is
a perspective view of a die holder of the apparatus of FIG. 8G.
FIG. 8L is a perspective view of a liner of the apparatus of FIG.
8G. FIG. 8M is a cross-section view of the liner of FIG. 8L. FIGS.
8N and 8O are perspective views of a piston of the apparatus of
FIG. 8G. FIGS. 8P is an end view and 8Q is a cross-section view of
the piston of FIG. 8N. FIGS. 8R and 8S are perspective views of
parts of a pipe guide of the apparatus of FIG. 8A. FIG. 8T
illustrates cross-sectional shapes for legs of an apparatus as in
FIG. 8A (and for corresponding holes receiving such legs). FIG. 8U
is a perspective view of a spring holder of the apparatus of FIG.
8A. FIG. 8V is a top view of an inner leg of the apparatus of FIG.
8A.
[0027] FIG. 9A is a side view of part of the system of FIG. 1A.
FIGS. 9B and 9C illustrate operation of the system as shown in FIG.
9A.
[0028] FIG. 10A is a perspective view of a brake drum of the brake
system of the system of FIG. 1A. FIG. 10B is a perspective view of
a brake disc of the brake system of the system of FIG. 1A.
[0029] FIGS. 11A (top) and 11B (bottom) are perspective views of a
connection lock member according to the present invention for use
with the system of FIG. 1A. FIG. 11C is a top view of the member of
FIG. 11A. FIG. 11D is a cross-section view of the member of FIG.
11A.
[0030] FIG. 12A is a perspective view of a crossover sub according
to the present invention. FIG. 12B is a top view of the sub of FIG.
12A. FIG. 12C is a cross-section view along line 12C-12C of FIG.
12B.
[0031] FIG. 13 is a perspective view of the bonnet of the system of
FIG. 1A.
[0032] FIG. 14A is a top view and FIG. 14B is a bottom view of a
load nut according to the present invention useful in the system of
FIG. 1A.
[0033] FIGS. 15A (top) and 15B (bottom) are perspective views of an
inner barrel of a rotating, head according to the present invention
useful in the system of FIG. 1A. FIG. 15C is a cross-section view
along line 15C-15C of FIG. 15E. FIG. 15D is a cross-section view
alone line 15D-15D of FIG. 15E. FIG. 15E is a cross-section view of
the seal of FIG. 15A. FIG. 15F is a cross-section view along line
15F-15F of FIG. 15E. FIG. 15G is a perspective view of an outer
barrel of the rotating head. FIG. 15H is a side cross-section view
of part of the system of FIG. 1A.
[0034] FIG. 16A is a perspective view of a washpipe assembly. FIG.
16B is a side view, partially in cross-section, of the washpipe
assembly of FIG. 16A.
[0035] FIG. 17A is a side view of an access platform of the system
of FIG. 1A. FIG. 17B is a front-view, FIG. 17C is a front
perspective view, FIG. 17D is a rear perspective view, FIG. 17E is
a bottom view, and FIG. 17F is a top view of the access platform of
FIG. 17A. FIGS. 17G and 17H are side views of the access platform
of FIG. 17A (and related structures). FIG. 17I is a front
perspective view of a guard member adjacent the access platform of
FIG. 17A. FIG. 17J is a rear perspective view of the member of FIG.
17I.
[0036] FIG. 18A is a perspective view of a motor dam for use with
the motor of the system of FIG. 1A. FIG. 18B is a cross-section
view of the motor dam of FIG. 18A.
[0037] FIG. 19A is a perspective view of a slinger for use with the
system of FIG. 1A. FIG. 19B is a cross-section view of the slinger
of FIG. 19A.
[0038] FIG. 20A is a perspective view of a slinger for use with the
system of FIG. 1A. FIG. 20B is a cross-section view of the slinger
of FIG. 20A.
[0039] FIG. 21 is a top view of a wear guide for use with-the
system of FIG. 1A. FIG. 22 is a cross-section view of the guide of
FIG. 21.
[0040] FIG. 23A is a side view of a block becket according to the
present invention. FIG. 23B is a cross-section view of the block
becket of FIG. 23A. FIG. 23C is a perspective view of a block of
the block becket of FIG. 23A. FIG. 23D is a perspective view of a
becket part of the block becket of FIG. 23A. FIG. 23E is a side
cross-section view of the becket part of FIG. 23D. FIG. 23F is a
front (or rear) cross-section view of the becket part of FIG. 23D.
FIG. 23G is a bottom view of the becket part of FIG. 23D. FIG. 23H
is a bottom perspective view of the becket part of FIG. 23D.
[0041] FIG. 24A is a perspective view of a spacer plate according
to the present invention. FIG. 24B is a cross-section view of the
spacer plate of FIG. 24A. FIG. 25 is a bottom view of the spacer
plate of FIG. 24A.
[0042] FIGS. 26A and 26B are perspective views of a link for use
with a system as in FIG. 1A. FIG. 26C is a side view and FIG. 26D
is a front view of the link of FIG. 26A. FIG. 26E is a top view and
FIG. 26F is a bottom view of the link of FIG. 26A.
[0043] FIGS. 27A-27C are side views of part of the system of FIG.
1A. FIGS. 27D-27F are top cross-section views of the parts of the
system of FIG. 1A shown above each of the drawings FIGS. 27A-27C,
respectively.
[0044] FIGS. 28A and 28B are perspective views of a building
according to the present invention for use, e.g., with a system as
in FIG. 1A. FIG. 28C is an end view of the building of FIG. 28A.
FIG. 28D is a top view (roof removed) of the building of FIG. 28A.
FIG. 28E is a perspective view of a carrier according to the
present invention useful with the building of FIG. 28A.
DESCRIPTION OF EMBODIMENTS PREFERRED AT THE TIME OF FILING FOR THIS
PATENT
[0045] FIGS. 1A-1D show a top drive system 10 according to the
present invention which has a swivel body 12 suspended with links
14 from a becket 16. The becket 16 is connected to a travelling
block (not shown). A gear system 20 is mounted on a spacer plate 22
which is supported by the swivel body 12.
[0046] A hollowbore alternating current permanent magnet motor 30
is coupled to the gear system 20. Any suitable permanent magnet
motor may be used; e.g., but not limited to, a commercially
available alternating current hollow bore permanent magnet motor
model TERA TORQ (TM) from Comprehensive Power Ltd., Boston, Mass.
(which motor is supplied with a control system and which has
associated computer system software and controls; and which can be
programmed so that the motor itself can serve as a brake). A brake
system 40 connected to the motor 30 is within a bonnet 44 through
which extends a gooseneck 46 connected to a kelly hose 7 (which is
adjacent a service loop 48) through which flows drilling fluid. An
extension system 98 according to the present invention provides
horizontal displacement of the top drive system 10 (see FIGS. 2C,
2D, 2E). The emergency brake system 40 can operate either
selectively or automatically (e.g., the driller has an emergency
brake bottom on the driller's panel 141).
[0047] The motor 30 has a splined output shaft 32 which drivingly
meshes with a splined portion 26 of the gear system 20 which has a
splined portion 224 that mates with a splined portion 52 of a drive
quill 50. A flange 54 of the quill 50 bears string load weight and
rotates on a main bearing system 56 on the swivel body 12. The
quill 50 extends through the motor 30, the gear system 20, the
spacer plate 22, the swivel body 12, a locking system 60, a load
collar 70, and a rotary seal 80. A lower end 58 of the quill 50 is
threadedly connected to a mud saver system 90 which itself is
connected to a saver sub 92. A system 100 for selectively gripping
tubulars is suspended from a load collar 70. Links 72 suspend an
elevator 74 from the load collar 70. Keys 395 in key slots 396 (see
FIG. 1I) releasably connect the end of the quill 50 to a connection
lock member as described below to insure a connection between the
quill 50 and mud saver system 90 is maintained.
[0048] A counterbalance system 110 (which can hold the weight of
the entire system 10 during stabbing of tubulars) includes two load
compensators 112 each with an upper end connected to a link 14 and
with a lower end connected to the swivel body 12. Lower ends of the
links 14 have openings 14c which are sized and configured to permit
a range of movement (e.g. about 6 inches) with respect to pins 13
that maintain the links 14 in the swivel body 12. Thus when the
swivel body 12 supports the brakes, motor, gear system and bonnet
counter balancing may be needed. Retainer plates 399 secured to the
swivel body 12 releasably retain the pins 13 in place in the
recesses 12b (i.e. the pins 13 do not take up all the space within
the link openings). Each load compensator 112 includes a
piston/cylinder assembly 114. The cylinders are balanced using
charged accumulators 116.
[0049] A link tilt system 120 provides selective tilting of the
links 72 and thus selective movement and tilting of the elevator 74
and movement of a tubular or stand of tubulars supported by the
elevator 74 to and away from a wellbore centerline. Bail retainers
404 retain the links 72 on the load collar 70. Link tilt hydraulic
cylinders 128 are interconnected pivotably between the load collar
70 (connected to its ears 128a) and arms 122. Each connector 124 is
pivotably connected to a lower end of an arm 122 and to a clamp 126
which is clamped to a link 72. Optionally, roller pins 127 extend
through the clamps 126 to facilitate movement of the links 72
within the clamps 126.
[0050] Guards 73 and 390 are on sides of an access platform 130.
The access platform 130 is releasably connected to a rear guard 454
at its top and pivotably at its lower portion to the swivel body 12
so that it can pivot and be lowered to provide a platform on which
personnel can stand to access various components on the rear guard.
Optionally, the access platform 130 may have an indented portion
132 for facilitating the, placement of tubulars thereon and for
facilitating movement of tubulars on the exterior of the access
platform 130.
[0051] The top drive system 10 can be movably mounted on a beam 82
(or "torque tube"). Horizontal displacement is provided by the
extension system 98 which includes a torque bushing 98a. The
extension system 98 with the top drive system attached thereto is
movable vertically on the beam 82 with the top drive system
attached thereto.
[0052] FIGS. 1J-1M show a load sleeve 170 according to the present
invention with four channels 170a therethrough. These channels
extend to a lower end of the load sleeve 170. At the bottom, each
of the four channels is in fluid communication with corresponding
channels in a rotating head 80 (see, e.g. FIG. 15A). The rotating
head 80 is connected on the lower end of the load sleeve 170. Via
the fluid channels in the load sleeve and the corresponding
channels in the rotating head 80, hydraulic fluid under pressure
provides power and/or lubricating for apparatuses below the
rotating head; including, e.g. link tilt apparatus, the clamping of
the system 100, the up/down movement of the system 100, the
elevator 74 when it is hydraulically powered, and the mud saver
system 90. This fluid also flows via appropriate channels to a
generator system 240 located at or near the level of pipe handling
apparatus, as described below, which produces electrical power for
directional valves that control flow in the various channels. A
flange 170c is connected to or formed integrally of a body 170d. A
threaded end 170e threadedly mates with corresponding threads in a
load nut. The flange 170c is bolted to the swivel body 12. In one
aspect when the link tilt system elevator 74 has received and is
holding a tubular or a stand, the cylinder assemblies 128 are under
a relatively heavy load. A directional valve 260 allows fluid to
flow from the lines connected to the cylinder assemblies 128
thereby relieving the pressure therein and allowing the links 72 to
move block ("float" to vertical, see "LINK TILT FLOAT," FIG.
3).
[0053] FIGS. 1N-1P show one design and embodiment for a swivel body
12 according to the present invention. FIG. 1N shows one side and
end (the other side and end are like the side and end shown). The
swivel body 12 has two holes 12a for ends of the links 14 and two
holes 12b for the removable pins 13. The holes 12b may have
bushings 12e. In one particular aspect the bushings 12e are
phenolic bushings, but they may be made of any suitable material,
including, but not limited to, brass, bronze, zinc, aluminum and
composite materials. The bushings 12e facilitate pin 13 emplacement
and removal and the bushings 12e are easily replaced. A channel 12c
extends through the swivel body 12 and receives and holds a main
bushing 56. As shown the pins 13 are stepped with portions 13a,
13b, 13c and phenolic bushings 13d and 13e may be used with the
pins 13. Drain port or outlet ports 12s, 12t (plugged with
removable plugs) permit lube oil flow through and permit the
draining of oil from the system. Port 12t allows lube oil through
to lubricate the lower quill stabilizer bearing via access via the
load sleeve 170.
[0054] The holes 12a may be circular, but are shown as rectangular
to inhibit turning of the links 14 in the holes. The holes may be
any suitable shape to inhibit link turning.
[0055] FIGS. 2A and 2B illustrate one installation of a top drive
system 10 according to the present invention in a derrick 140. The
top drive system 10 is suspended from a block becket 18 according
to the present invention which is suspended from the derrick 140 in
a typical manner. Although it is within the scope of the present
invention to use a standard block and hook for hooking a standard
becket, in one aspect the present invention provides an integrated
block becket 18 which dispenses with the common swiveling hook. As
shown in FIG. 2A, the elevator 74 is supporting a tubular stand 142
which includes two pieces of drill pipe 143. The stand 142 has been
moved from a monkey board 145 with multiple made-up stands 149 to a
position axially aligned with a wellbore 147. A mousehole 144 may
be used, e.g. to make stands. A driller controls drilling from a
driller's panel 141.
[0056] FIG. 2G shows schematically a top drive system 10a according
to the present invention (which may be any system according to the
present invention as disclosed herein, but without a block becket
according to the present invention) with a travelling block T, hook
H, and becket B (each of which may be a suitable known block, hook,
and/or becket, respectively).
[0057] The flange 54 of the quill 50 rests on the main bearing 56,
a thrust bearing, e.g. a V flat type thrust bearing which has
multiple tapered rollers 57. The upper surface of the flange 54
abuts an upper thrust bearing 59 located in a suitable recess 24 of
the spacer plate 22 (see e.g. FIGS. 1C, 1D, 1G, 1H). The quill 50
has an upper part 51 in fluid communication with the gooseneck 46
via a wash pipe 374. In one particular aspect the main bearing 56
is a V-type thrust bearing which accommodates eccentricity, if
present, in the quill 50 and is self-cleaning.
[0058] The swivel body 12 and associated structures provide dual
load paths (which is desirable for reducing maintenance
requirements. Drilling loads through the quill 50 travel through
the main bearing 56, through the swivel body 12, to the links 14,
to the becket 16 and then to the travelling block 18 (or to a block
becket 18 according to the present invention). Tripping loads (or
"string loads" imposed on the system by tubulars being supported by
the system) are imposed on the links 72 through the elevator 74,
then onto the load collar 70 and the load, sleeve 170, to the
swivel body 12, to the links 14 and to the becket 16. This
dual-load path allows for rotation of the system 100 whether the
quill 50 is rotating or not. The tripping loads are not imposed on
the quill 50, but are transferred via the tripping load path around
the quill 50 through the swivel body 12 and links 14.
[0059] In one particular aspect the permanent magnet motor 30 is a
Model 2600 TERA TORQ.TM. motor commercially available from
Comprehensive Power Ltd. which is a liquid-cooled AC permanent
magnet hollow bore motor which generates 700 HP and operates at a
maximum speed of 2400 RPM. The motor has axial bearings and a
splined output shaft and is designed to hold drill string torque at
full stall (at "full stall" motor RPM's are zero) or while engaged
in jarring (e.g. using shock loads for various purposes). A central
hollow bore 30a extends through the motor 30 from top to bottom
through which fluid, e.g. drilling fluid, can flow through the
motor. In one particular aspect such a motor is supplied with a
Variable Frequency Drive control system (in one aspect, drive
system 531, FIG. 28D) which is a liquid-cooled modular electronic
unit with modules that can be changed in about five minutes. Such a
system can translate generator horsepower at over 90% efficiency
and can run in temperatures of -40.degree. C. to 60.degree. C. and
in high (e.g. up to 100%) humidity.
[0060] In one particular aspect the gear system 20 includes a
single speed planetary gear reduction, system with gear
combinations providing a 9.25:1 ratio (or a 12:1 ratio) and with a
liquid-cooled gear box which is fully lubricated down to 0 RPM. The
system has a splined input shaft 26 for mating with the splined
motor output shaft 32 for transmitting power to the quill 50.
[0061] The compensator system 110 permits a soft landing for a
tubular when the top drive is lowered to stab the tubular into a
connection.
[0062] In one particular,aspect the mud saver system 90 is a
commercially available double ball internal blowout preventer
system from R Folk Ventures of Calgary, Canada which has two
internal blowout preventers and which is rated to 15,000 psi. An
upper valve is hydraulically actuated by an actuator mounted on the
valve and a lower valve is manually opened and closed.
Alternatively, a Hi-Kalibre mud saver system (commercially
available) can be used,instead of this mud saver system.
[0063] FIGS. 4A-4D show, among other things, the interconnection of
the motor 30 and gear system 20 and the respective position of
these items, the bonnet 44, the brake system 40, the spacer plate
22, the swivel body 12, the quill 50, and the load sleeve 170.
Within the lower part of the bonnet 44 are three caliper disc
brakes 180 (e.g. commercially available systems) which act on a
brake disc 183 (see FIG. 10B) which is secured to a brake hub 41
(see FIG. 10A) secured to the motor 30. Shims preload the bearing
59, a pre-load that does not need to be re-set due to a shoulder
structure of the spacer plate 22.
[0064] FIG. 4D shows a gear system 20 which has a housing 480 from
which extends a sight glass apparatus 481 for checking fluid level
in the system 20 which includes a breather apparatus 482 that
allows atmospheric pressure above the lube system to encourage
downward gravitational flow. An input spline 26 drivingly meshes
with the correspondingly splined output shaft 32. A first sun gear
483 rotates, e.g. at 2400 rpm and three planet gears 484 on stubs
485a of an upper carrier 485 rotate around the first sun gear 483.
Five lower planet gears 486 rotatably mounted on stubs 487a of a
lower carrier 487 encircle a second sun gear 488. An output spline
489 drivingly meshes with the splined portion 52 of the quill. In
one aspect the output spline rotates at 259 rpm when the first sun
gear 483 rotates at 2400 rpm. An optional seal 491 seals an
interface between the gear system 20 and the motor 30. Bolts
through holes 492 connect the system 20 to the spacer plate 22. The
first sun gear 483, driven by the motor 30, drives the planet gears
484 which drive the upper carrier 485, which rotates the second sun
gear 488 which drives the five lower planet gears 486, which drive
the lower carrier 487, which drives the output spline 489. The
output spline 489 rides on bearings 493. Magnetic plugs 494 (one
shown) collect metal debris. An upper bearing 495 is lubricated
through a port 496 and a top mechanical seal 497 (which prevents
oil from going up into the motor 3D) is located in a top member 498
connected to and rotatable with the sun gear 483. Bolts in bolt
holes 499 (one shown; twenty four bolts used in one aspect) connect
the gear system 20 to the motor 30. An oil path 501 allows oil to
lubricate the planet gears and their bearings.
[0065] The locking mechanism 60, described in detail below, is
bolted beneath the swivel body 12, supported on the load collar 70,
and provides releasable locking of the system 100 in a desired
position. In one particular aspect the system 100 is operable
throughout a full 360.degree. in both directions, at about 4 RPM.
In one particular aspect the system 100 is driven by four low speed
high-torque motors 190 which are fixed to a movable toothed lock
plate 191 which is suspended, by two hydraulic cylinders 192 which
selectively move the lock plate 191 up and down (e.g. in one aspect
with a range of motion of about 1.75 inches) to engage and
disengage a rotate gear 193 whose rotation by pinion gears 69
located in pinion gear recesses 69c (driven by the motors 190)
results in a rotation of the system 100. Shafts of the motors 190
are in channels 69d of the pinion gears 69. The rotate gear 193 is
bolted to the top of a gear collar 194 which itself is bolted on
top of the load collar 70. A lock guide 62 (FIG. 7D), bolted to and
beneath the swivel body 12, has a splined portion 63 which is
always in mating engagement with a corresponding splined portion
195 of the lock plate 191, so that lowering of the lock plate 191
results in engagement of the rotate gear 193 with the locking plate
191 and thus in locking of the system 100 preventing its rotation
when the hydraulic cylinders 192 have lowered the lock plate 191 so
that its inner teeth 196 engage teeth 197 of the rotate gear 193.
The pinion gears 69 (FIG. 7F) are in contact with the rotate gear
193 whether the system is locked or not and rotation of the pinion
gears 69 by the motors 190 results in rotation of the system 100.
FIG. 7A shows the lock engaged in a locked position, i.e. the
system 100 cannot rotate. When the system is unlocked, the pinion
gears 69, turned by the motors 190, turn the rotate gear 193, e.g.
to reposition the system 100 or the elevator 74. In the locked
position the quill 50 can still rotate, but the system 100 cannot.
Optionally, to facilitate tooth engagement, the teeth 195 can have
tapered lead-ins 195a and the teeth 197 can have tapered lead-ins
197a. These profiles insure synchronization between the gear 196
and the rotate gear 193. The gear 196 has teeth for the great
majority of its circumference providing more structure and more
strength to hold the system 100 and the link-tilt apparatus and
prevent rotation of the system 100 in a locked position. Cups 69a
maintain the pinion gears 69 in recesses 69c. The lock guide 62 has
four ports 62q-62t each aligned with a channel 170a of the load
sleeve 170 so that hydraulic fluid from the upper hydraulic
manifold 452 can flow to and through the load sleeve 170 to the
rotating head 80. Suitable hoses and/or tubing conduct fluid from
the upper hydraulic manifold 452 to the lock guide ports
62q-62t.
[0066] The gear collar 194 (FIGS. 5A, 5B) is bolted on top of the
load collar 70 with bolts 194a. Grease to lubricate the wear sleeve
62 and the load collar bearing 67 is introduced into grease ports
194d. When the lock plate 191 has been lowered to engage the rotate
gear 193 to prevent rotation of the system 100, the quill 50 can
still rotate. Optionally the hydraulic cylinders 192 can have
springs and/or spring washers 198 to provide a fail safe lock, e.g.
when there is a loss of power to the hydraulic cylinders 192.
Depending on the size, configuration, and disposition of
interengaging teeth, the system 100 can be locked at desired
circumferential increments. In one particular aspect, e.g. with
components as shown in FIGS. 7A-7E, the system 100 can be locked
every 4 degrees. Such a range of movement--a full
360.degree.--allows the lower pipe handling equipment to thread
tubulars together.
[0067] A rotating head 80 provides hydraulic power to the rotatable
system 100. This hydraulic power operates a generator 240 mounted
in a lower electrical junction box 250 and valves 260 (see, e.g.
FIG. 8A). In one aspect the generator 240 is a mini generator,
e.g., but not limited to, a commercially available mini generator
set from Comprehensive Power Ltd. of Boston, Mass. In one aspect
the junction box 250 is a zone 0 rated junction box. The generator
240 provides electric power to directional valves 260 on the lower
hydraulic manifold 400 mounted on an upper leg of the system 100.
The generator 240 is powered by hydraulic fluid from the rotating
head which powers the generator. Also, optionally, the system
includes digital signal processor card systems 256a, 256b, 256c
(lower electrical junction box 250), 256d, each with its own RF
antenna. A DSP system 256a (shown schematically in FIG. 2A), is
located in the driller's panel 141; a DSP system 256b, is on the
rear guard 454 in the upper electrical box 450; and a DSP system is
in the lower electrical junction box 250 on a lower leg of the
system 100; and/or a DSP system 256d in the building 160. These DSP
systems provide communication between the top drive's components
[e.g. the mud saver system 90, extension system 98, motor 30,
system 100, elevator 74, (when powered), brake system 40, lock
system 60] and the driller; and, in one aspect, with personnel in
the building 160.
[0068] FIGS. 8A-8C illustrate one embodiment of the system 100 for
selectively clamping tubulars, e.g. pipe or casing. Top ends of the
outer legs 285 of the system 100 are connected to connection
structures 194b and 194c of the gear collar 194 with pins 285a and
with pins 285b to connection structures 70a of the load collar 70;
and the bottom ends of the inner legs 283 are bolted to a body 284.
Each leg has two parts, an inner (lower) part 283 and an outer
(upper) part 285. The inner parts 283 move within the outer parts
285 to provide a telescoping action that permits upward and
downward motion of the system 100 (e.g. in one aspect with an
up/down travel range of 28.5"). A spring or springs 286 within each
leg on a spring mount 289 so that when breaking a connection the
springs compensate for thread travel; and when making a connection
the vacuum in assemblies 282 compensates for upward travel of the
threads. In one particular aspect (see FIG. 8C) there is a stack of
belleville springs 286 in each leg mounted on rods 289a of the
spring mount 289 which is connected to the inner leg.
[0069] The body 284 has dual opposed halves 288, 289 pinned
together with removable pins 291 so that the body 284 can be opened
from either side with the structure on the unopened side serving as
a hinge. Also, both halves can be unpinned (removing the pins 291)
permitting the legs to be moved apart (following removal of the
pins 285b) allowing access to items on the legs (e.g. the lower
electrical junction box 250 and the lower hydraulic manifold 400)
and to other components of the system. In certain aspects the two
halves are identical facilitating replacement and minimizing
required inventory. Each inner leg has a piston/cylinder assembly
282 which receives hydraulic power fluid via an inlet 282c from the
lower hydraulic manifold 400. Each assembly 282 has a hollow
cylinder 282a and an extensible rod 282b which provides the range
of movement for the legs.
[0070] Two clamping apparatuses 280 (see FIGS. 8G-8Q) disposed in
the body 284 selectively and releasably clamp a tubular to be
gripped by the system 100. Each clamping apparatus 280 has a piston
281 movably disposed within a liner 292 which itself is mounted
within a mount 293. Each mount 293 has a plurality of ears 294 with
holes 295 therethrough for receiving the pins 291. Connected to
each piston 281 with bolts 299c (in holes 299d of the pistons 281)
is a die holder 297 with recesses 298 for releasably receiving and
holding die mounts 299 with dies 301. In one aspect the liner 292
is made of steel or other suitably hard material and is
replaceable. Lubricating grease is applied through grease fittings
299a (one shown) and pins 299b (one shown) limit rotation of the
die holders 297. The gear collar 194 is connected to the legs 285
with connectors 285g and the load collar is connected to the legs
285 with connectors 2851.
[0071] Hydraulic fluid under pressure from the rotating head 80
supplied from the lower hydraulic manifold 400 at a rear 302 of
each piston 281 flows into a "CLOSE" port 304 to clamp a tubular.
To release a tubular, hydraulic fluid is supplied to an "OPEN" port
306. Dotted lines 687 indicate the lines between the rotating head
80 and the lower hydraulic manifold 400. One of the lines 687 may
be a spare line which is plugged shut until needed. Power cables
688 convey electrical power to the lower electrical junction box
250. Gland connectors may be used for connections. This fluid
pushes against a piston opening surface 307 to move the piston 281
and its associated die apparatus away from a tubular resulting in
unclamping and release of the tubular. Fluid enters (or leaves) the
ports 304, 306 and fills behind the pistons to clamp onto a tubular
or other item. As fluid enters one port, fluid leaves the other
port. Also, in one aspect fluid flows to (and from) both pistons
simultaneously for balanced clamping and unclamping. Directional
valves 260 in the lower hydraulic manifold 400 control flow to and
from the ports 304, 306. A recess 285m receives and holds a
corresponding projection member (not shown) of the mud saver system
90 to insure that the mud saver system 90 rotates with the system
100.
[0072] In one aspect the system 100 develops sufficient torque to
break connections involving the quill 50 and the mud saver 90 and
the mud saver 90 and a saver sub 290; and to make/break tubular
connections between the saver sub 290 and tubulars. In one
particular aspect a system 100 as shown in FIGS. 1C and 8A has a
downward thread feed of about 6" against the springs 286; an upward
range of movement of about 7" against an hydraulic cylinder vacuum
in the cylinders 282; and an up-down travel range when unclamped of
about 28.5". By using two spaced-apart legs instead of a single
support to support the system 100, relatively thinner legs may be
used to accommodate the same amount of torque as a prior art
single-leg support and, with the present invention, twisting is
inhibited and decreased as compared to a single-leg support (e.g.
in certain aspects a single leg; of a single-leg prior art system
is more than twice the thickness of each of the two legs according
to the present invention), but the two legs are sufficient to
handle the makeup/breakout torques produced. (e.g. up to 60,000 ft.
lbs in some embodiments). Providing relatively thinner legs also
means that the overall area occupied by the system 100 is reduced,
thus permitting the system 100 in rotation to require a smaller
compact space for operation. By pulling both pins 291, the halves
of the gripper system can be separated and moved apart from each
other. The range of clamping apparatus up/down movement with
corresponding clamping locations allows the system 100 to clamp
onto the mud saver system 90, or the saver sub 290 to assist in the
breaking of the quill/mud-saver-system connection, the
mud-saver-system/saver sub connection or a connection between a
tubular and the saver sub.
[0073] In one particular aspect a system 100 as shown in FIG. 1C
and 8A with a die holder 297 that is about 1.25 inches wide and
dies 301 measuring 53/4" long.times.5/8" thick, a range of pipe
between 3.5" (e.g. tool joints) and 9.5" (e.g. collars) can be
handled. In one particular aspect the die mounts 299 are swivel die
mounts which facilitate the system's ability to accommodate a range
of tubular diameters; but it is within the scope of this invention
to use non-swivelling die mounts.
[0074] A pipe guide 310 is connected to the bottom of the body 284.
In one aspect the pipe guide 310 includes two halves 311 (see FIGS.
8R, 8S) with tapered surfaces 312 to facilitate tubular entry into
the system 100. Pins through holes 313 in the halves 311 and
through holes 316 in ears 315 of the mounts 293 releasably secure
the halves 311 to the mounts 293. Safety chains 314 releasably
connect to connectors 317 on the mounts 293 and to connectors 317a
on the body 284 prevent the system 100 from falling if it is
inadvertently released from the legs, grabbed, pulled on, or pulled
up with the top drive. Legs 283, 285 may be chained together at
connections 283d, 285d.
[0075] It is within the scope of this invention for the legs 282 to
have a circular cross-sectional shape. In one aspect, as shown in
FIGS. 8A-8F, the inner legs 283 have a rectangular cross-sectional
shape 322 which prevents them from rotating within correspondingly
shaped openings 321 in the outer legs 285. This non-rotation
feature is desirable because it inhibits twisting of the legs and,
thereby twisting of the system 100. It is within the scope of the
present invention to achieve this non-rotation function with legs
of non-circular cross-section, e.g. inner legs with non-circular
shapes 323-329 as illustrated in FIG. 8T.
[0076] FIG. 9A shows the links 72 suspending the elevator 74
beneath the system 100. The link tilt system 120 is not actuated.
As shown in FIG. 9B, the link tilt system 120 has been actuated
with hydraulic fluid from the rotating head 230 applied to the
piston/cylinder assemblies 128 to extend the piston 121 to move the
links 72 and elevator 74 away from the system 100. As shown in FIG.
9C, the piston 121 has been retracted, resulting in the movement of
the links 72 and elevator 74 in a direction opposite to the
direction of movement, shown in FIG. 9B. Roller pins 127 within the
clamps 126 facilitate link movement with respect to the clamps 126.
In one particular aspect such a bi-directional link tilt system can
be tilted in one direction toward a V-door of a rig to more easily
accept a stand of pipe from a monkey board, and in the other
direction toward the rig, moving the elevator out of the way of a
drill string and top drive, to permit drill down closer to a rig
floor since the elevator is moved out of the way. In one particular
aspect, the link tilt system 120 can move the links 72 and elevator
74 thirty degrees toward the V-door and, in the other direction,
fifty degrees toward the mast.
[0077] FIGS. 11A-11D show a connection lock member 340.
Corresponding connection lock member pairs (like the members 340)
have corresponding teeth 341 that mesh to lock together: the quill
50 and the mud saver system 90; and the mud saver system 90 and the
saver sub 290. Keys 395 on the quill 50, keys (not shown; like keys
395) on the mud saver system 90, and keys (not shown; like keys
395) on the saver sub 290 are received and held in corresponding
keyways 344 of the connection lock members 340. The connection lock
members 340 are secured with set screws 402 extending through holes
342. Clamps 401 clamp around the quill 50, the mud saver system 90,
and the saver sub 290 (see FIG. 8A) to maintain the connection lock
members in position with keys in their respective keyways. Use of
the connection lock members 340 provides a positive releasable lock
of the quill 50 to the mud saver system 90 and of the mud saver
system 90 to the saver sub 290 so that the top drive cannot unscrew
the mud saver system 90 from the quill 50 or the mud saver system
90 from the saver sub 290. Thus joints can be made and broken with
the system 10 without the mud saver system 90 separating from the
saver sub and without the quill 50 separating from the mud saver
system 90.
[0078] Optionally, an integrated block becket apparatus 18 (see
FIGS. 23A-23G; instead of a becket 16 as in FIG. 1A and instead of
a travelling block/hook combination, e.g. as in FIG. 2G) is used in
the system 10 which, in one particular embodiment, adds only 17
inches to the top drive system's height and which eliminates the
need for a standard block/hook combination which can be over 9'
high. Pin holes 303a in a becket 303 are alignable with pin holes
420a (four of them equally spaced apart in the block 420) in a
block 420 to permit selective positioning of the becket 303 with
respect to the block 420. This allows selective orientation which
can, e.g. be beneficial in some smaller rigs with crown sheaves
oriented differently from those in other rigs. With a block becket
18, the block 420 can be correctly oriented. It is within the scope
of the present invention to use any desired number of becket and
block pin holes to provide any desired number of positions. The
becket 303 has ears 305, 307 with holes 305a, 307a respectively
through which extend pins 309 to releasably connect to
corresponding structure of a top drive system. Plates 311 bolted
with bolts 313 to the becket 303 releasably hold the pins 309 in
place. A shaft 422 of the block 420: is received on a channel 315
of the becket 303. Plates 424 bolted to the shaft 422 with bolts
426 and bolted to a bushing or retainer 428 with bolts 432 retain
the becket 303 on the shaft 422. The channel 315 and the shaft 422
may be threaded for threaded connection of the block 420 and the
becket 303. Typical lines or cables (not shown) are disposed around
sheaves 434 which rotate around a shaft 436 of the block 420. The
block becket 18 can be lifted and lowered using the eyes 442.
[0079] In one particular aspect, the height of a system 10 with a
becket with the block becket 18 is about 19' from the becket throat
down to a tool joint in an elevator using upper links which are
about 96" long and a hook is used which may be, e.g. 10' long.
Using an integrated block becket system according to the present
invention this overall height is about 20'6".
[0080] Using the hollowbore permanent magnet motor 30, planetary
gear system 20 and a standard swivel packing assembly mounted on
top of the motor 30, a fluid course is provided through the entire
top drive from the gooseneck 46 down to the saver sub 290 and then
to a tubular or tubular stand connected to the saver sub 290. In
certain aspects, this fluid course is rated at 5000 psi working
pressure (e.g. a fluid course of about 3" in diameter from the wash
pipe down to the saver sub). The swivel packing assembly (see FIGS.
16A, 16B) includes a standard wash pipe assembly 370 with a wash
pipe 374, unitized packing 381, 385 and union-type nuts 371, 372
which allow the assembly to be removed as a unit.
[0081] FIGS. 12A-12C illustrate an optional crossover sub 350 with
a body 351 which has interior threads 352 for selective releasable
connection of the sub 350 to the lower end of the quill 50. Upper
teeth 353 mesh, with corresponding teeth of a connection lock
member on the quill 50. Lower teeth 354 can mesh with teeth of a
connection lock member on the mud saver system 90 located below a
quill 50. These mesh teeth prevent unwanted disconnection. A
smaller diameter threaded end 355 can threadedly mate with a
correspondingly-threaded mud saver system.
[0082] FIG. 13 shows the bonnet 44 with its lower housing 361 which
houses the brake system 40 and with an upper plate 362 with a hole
362a for the gooseneck 46. Hatches 363 provide access to the brake
apparatuses 180 and permit their removal from within the bonnet
44.
[0083] A load nut 366 is shown,in FIGS. 14A and 14B. As shown in
FIG. 1F, the load nut 366 holds the load collar 70 on the load
sleeve 170. The load collar 70 rotates on a bearing 367 housed
within a recess 368 of the load nut 366. Threads 369 mate with
threads 170e on the load sleeve 170 to secure the load nut 366 to
the load sleeve 170.
[0084] The rotating head 80 shown in FIG. 1C and FIGS. 15A-15H at
the bottom of the load sleeve 170 has an inner barrel 230 with a
body 82 with an upper flange 83 and an outer barrel 372 with
rotating ears 373 which are received in recesses 374 (see FIG. 8D)
in the outer legs 285 of the system 100 to insure that the rotating
head 80 rotates with the system 100. A recess 84 in the inner
barrel 230 provides space for a stabilizing bearing 85 which
stabilizes the bottom end of the quill 50. A bearing retainer 560
retains the bearing 85 in place. Bolts 561 (eight; one shown) bolt
the inner barrel 230 to the load sleeve 170. A gap 562 (e.g.
between 0.30 inches and 0.10 inches) between the inner barrel 230
and the load nut 366 prevents a load from being transmitted from
the load nut to the inner barrel. Bolts 563 prevent the load nut
366 from rotating.
[0085] The inner barrel 230 has four ports 230a, 230b, 230c, 230d
which correspond to and are aligned with the four channels 170a of
the load sleeve 170 and fluid flows down through the channels 170a
into the ports 230a-230d. Three of the channels 230a are in fluid
communication with corresponding paths 372a, 372b, 372c of the
outer barrel 372 and one of the channels 230a-1, a lubrication
channel provides lubrication to items below the rotating head 80
(e.g. the lower quill stabilizing bearing 85). Four seals 372s
isolate the paths 372a-c.
[0086] The location and function of the rotating head 80 (which
rotates with items like the system 100 below the top drive gear and
motor components which are rotated by the motors 190) makes it
possible to have a lower hydraulic manifold 400 with
flow-controlling directional valves which also rotates when the
motors 190 rotate the system 100. By locating the generator 240 at
this level, electrical power is provided for the directional valves
by the generator 240.
[0087] FIGS. 16A and 16B illustrate the wash pipe assembly 370. In
use the nut 372 does not rotate and the gooseneck 46 is connected
at its top so that fluid is flowable through the gooseneck 46 into
a central fluid channel of the nut 372. The nut 371 has a female
threaded end for threaded connection to the top of the quill 50.
The nut 371 rotates with the quill 50 about the wash pipe 374.
[0088] FIGS. 17A-17H show the access platform 130 of the system 10
(see, e.g. also FIGS. 1A, 1B, 1D). Upon release, the access
platform 130 is pivotable from a position as shown in FIG. 17G to a
position as shown in FIG. 17H, supported by one or more cables 134.
In the position of FIG. 17H, a person can stand on the access
platform 130 to access the motor 30, and/or items connected to an
inner guard member 135 (shown in FIGS. 17H, 17I), e.g. items
including items on a rear guard 454 including a heat exchanger 455,
pump 458, upper electric junction box 450, extend accumulators 451,
filer 457 for hydraulic fluid, motor 459, pump 458, flow meter 456,
upper hydraulic manifold 452 with electrically powered directional
valves 453. Connectors 136 are bolted to the swivel body 12 and a
stabilizer member 137 is connected to a motor flange 30f.
Connectors 130a of the access platform 130 are hingedly connected
to connectors 136a of the rear guard 454, e.g. with a pin or pins
130c. Bolts 130b through holes 130d releasably secure the access
platform 130 to the top of the rear guard 454. An optional brace
138 extends across the interior of the access platform 130.
Optionally, bevelled, tapered, rounded, or chamfered edges 139a,
139b, 139c, 139d, 139e are used and/or with a tapered bottom
portion 139d to inhibit items catching onto part of the access
platform 130. The access platform 130 can be lifted using an eye
member 130e.
[0089] FIGS. 18A and 18B illustrate a motor dam 31 emplaced on the
motor 30 to inhibit drilling mud or other fluid from getting into
the motor 30.
[0090] Two slingers, slingers 76 and 77, inhibit fluid (e.g.
drilling mud) from contacting the brake system 40, FIGS. 19A and
19B show an upper slinger 76 with a recess 76b for accommodating a
lip of the bonnet 44 and a groove 76c for an O-ring seal to seal
the slinger/quill interface. FIGS. 20A and 20B show a lower slinger
77 with an O-ring groove 77a for an O-ring seal to seal the
slinger/quill interface. These slingers prevent drilling fluid from
getting on the brake disc.
[0091] FIGS. 21 and 22 show a wear sleeve locking guide 62. This
wear sleeve lock guide acts as a bearing on which the rotate gear
193 rotates and also maintains a desired gap between the rotate
gear 193 and the lock guide 62. In one aspect the guide 62 is made
of phenolic material.
[0092] FIGS. 24A, 24B, and 25 show the spacer plate 22 with its
recess 22a for receiving the bearing 59. The gear system 20 sits in
a recess 22b. An extension 22c fits into the channel 12c in the
swivel body 12. Through a hole 22d passes lubricating fluid coming
from the gear system 20 which flows down into the swivel body 12
and then downward to lubricate items below the swivel body 12. From
the swivel body 12 this lubricating fluid flows into the
lubricating path of the load sleeve 170 and from there to the
rotary seal 80, then to the lower stabilizer bearing 85. A shoulder
22s inhibits bearing deflection, e.g. while jarring, and makes it
unnecessary to re-set bearing pre-load.
[0093] FIGS. 26A-26E show links 430 which is one form for the links
72. Each link 430 has a body member 432 with an upper connector 434
at the top and a lower connector 435. A slot 436 extends through
the body member 432.
[0094] A lower portion 437 of the link 430 is disposed outwardly
(e.g. to the right in FIG. 26C) from the link's upper part. A hole
438 permits connection to the link. Holes 439 permit connection to
the load collar. This disposition of the lower portion 437
facilitates movement of the link with respect to system components
adjacent this portion of the link.
[0095] FIGS. 27A-27F illustrate how clamps 126 of the link tilt
system 120 can accommodate links of different cross-sectional
diameters. The clamps 126 have two roller pins 127a, 127b each with
a roller 127d and roller mounts 127c. Holes 127e are offset in each
roller mount 127c providing two positions for the rollers 127d. As
shown in FIGS. 27A and 27D, a link A (like the link 72) moves
between the rollers 127d and is, e.g. about 27/8" wide. As shown in
FIGS. 27B and 27E, with the rollers 127d in the same position as
the rollers 127d in FIG. 127D, a link B (like the link 72) is
accommodated, e.g. a link B with a width of 3.5". As shown in FIGS.
27C and 27F, the roller mounts 127c have been repositioned in holes
127f, moving the rollers 127d further apart so that the clamp can
accommodate a wider link, e.g. the link C (like the link 72) which
is 4.5" wide. A grease nipple 127g is provided for each pin 127a,
127b. Each pin 127a, 127b has a threaded end (a top end as viewed
in FIG. 27D) which is threadedly engaged in corresponding threads
in the roller mounts 127c (top roller mounts 127c as viewed in
FIGS. 27D, 27E, 27F). Holes in the other roller mounts (lower ones
as viewed in FIGS. 27D, 27E, 27F) may be unthreaded. In one aspect,
links A are 250 ton links; links B are 350 ton links; and links C
are 500 ton links.
[0096] FIG. 3 shows schematically a control system 150 for a top
drive 152 according to the present invention (e.g. like the top
drive 10) with a building 160 according to the present invention
adjacent a location of the top drive 152. The building 160 houses
various circuits and controls, among other things, as discussed in
detail below.
[0097] FIGS. 28A-28C and 28E show the building 160 on a skid 540
according to the present invention which has four walls 161a-d, a
floor 161e, and a roof 161f (which in one aspect comprise a typical
ISO container). A carrier 169 (see FIG. 28D) with a skid 169a with
fork lift pockets 169b is mounted on top of the roof 161f for
holding and storing of the service loop and/or of hoses. Doors 541
are at both ends of the building 160 and doors 541a and 541b
(optionally vented with vents 541f) are on a side. Windows 541c are
on a side and vent openings 541d, 541e are on another side. Pieces
82b of the beam 82 or ("torque track") are housed within
compartments 162 in the wall 161d. A space 163 within the building
160 is sufficiently large to hold the major components of a top
drive system like the system 10 FIG. 1A.
[0098] The building 160 also houses electrical power generator 530
(e.g. diesel powered); variable frequency drive system 531 for
providing electrical power for the motor 30; a temperature/humidity
control system 531a for controlling temperature and humidity of the
system 531 and of a coolant system 532; an hydraulic fluid tank
533; an electrical junction box 534; an optional control system
535; pumps 536 and radiators 537 of the coolant system 532; and
furniture and furnishings, e.g. item 538. An optional vacuum system
688 will remove drilling fluid from the system in the event of a
shut-down so the fluid will not freeze in the lines.
[0099] In certain aspects the beam 82 serves as a "torque tube"
through which torque generated by the top drive is reacted from the
top drive, to the extension system 98, to the beam 82 and then to
the derrick. In one particular aspect part 82a of this beam 82 is
used as a skid or support on which the top drive is mounted to
facilitate transport of the top drive; and this part 82a of the
beam 82, with a skid portion 82d, is removably housed in the
building 160 with the top drive in place on the beam 82. In one
particular aspect (see FIG. 2F), a top piece 82f (FIG. 2D) of the
beam 82 is length adjustable to accommodate different derrick
conditions. In one aspect one, some or all of the pieces are length
adjustable, e.g. two telescoping pieces 82g, 82h which can be
pinned through one hole 82j and one hole 82k with a pin (or pins)
82i at a number of different lengths depending on the holes
selected; and/or such pieces can be threadedly connected together
with threads 82m, 82n for length adjustability. Pieces that make up
the beam 82 may have holes or pockets 82e for receiving a fork of a
fork lift.
[0100] As shown in FIGS. 2C-2D, an opening 375 between members of
the extension system 98 provides a passageway through which can
pass a tubular stand 376 once a top drive supported by the
extension system 98 is extended so that the top drive is no longer
over the stand. This can be beneficial in a variety of
circumstances, e.g., when pipe is stuck in the well or the top
drive needs to be accessed, e.g. for inspection or repair. The
saver sub is disconnected from the stand; the top drive is
moved-further outwardly so it is no longer directly over the stand;
and the extension system 98 is lowered with the stand moving
through the opening 375. This permits access to the top drive at a
lower level, e.g. at or near the rig floor. The source of power for
the cylinder assemblies 392 of the system 98 is the accumulators
451 (see FIG. 17D). The assemblies 392 are pivotably connected to
support structure 393 with top drive mount 394 which is secured
with bolts to the swivel body 12.
[0101] Control of the various system components is provided by a
control system that includes: the driller's panel 141; a digital
signal processor ("DSP") system 256a in the driller's panel 141; a
DSP system 256b in the upper electrical junction box 450; a DSP
system 256c in the lower electrical junction box 250; and/or a DSP
system 256d with the control system 531. Each DSP system has an RF
antenna so that all DSP systems can communicate with each other.
Thus a driller at the driller's panel 141 and/or a person at the
control system 531 can control all the functions of a top drive
system 10.
[0102] Lubrication oil (hydraulic fluid) flows in the service loop
48 to the plugboard 391; into the upper hydraulic manifold 452 and
heat exchanger on the rear guard 454, behind the access platform
130; through the filter 457 with flow metered by the flow meter
456; out to the gear system 20 (cleaned by the magnetic plugs 494)
with level indicated in the sight glass 481; out the bottom of the
gear system 20, lubing the splined portion 52 of the quill 50 and
the upper bearing 59; into the swivel body 12 and out its drain
12s; into the load sleeve lubrication port and down a channel 170a
of the load sleeve; into and through the rotating head 80 through
the lubrication port of the inner barrel 230; to the lower quill
stabilizing bearing 84; up through a space 405 between the load
sleeve 170 and the quill 50 through the self cleaning main bearing
56; then back to an out line in the plugboard 391 and into an exit
line in the service loop 48. Hydraulic fluid flows through the
other three ports (other than the lube port/channels) in a similar
fashion. Appropriate lines, hoses, cables, and conduits from the
service loop 48 (including electrical lines etc. to the upper
electrical junction box 450) are connected to the plugboard 391 and
from it: control cables to the upper electrical junction box 450
and to an upper junction box (not shown) of the motor 30; hydraulic
lines to the upper hydraulic manifold 452 and to the lubrication
system; coolant fluid lines to the motor 459 and heat exchanger
455. Power cables from the service loop 48 are connected to the
junction box of the motor 30.
[0103] Cables from the service loop 48 are connected to
corresponding inlets on the plugboard 391; e.g., in one aspect,
three hydraulic fluid power lines are used between the plug board
391 and the upper hydraulic manifold 452--an "in" fluid line, and
"out" fluid line, and a spare line for use if there is a problem
with either of the other two lines. Also in one aspect there are
three lines from the plug board 391 to the motor 459. The motor 459
powered by hydraulic fluid under pressure, drives a pump 458 which
pumps fluid to items below the rear guard 454. The fluid that is
provided to the pump 458 is a coolant fluid (e.g. glycol and/or
water; ethylene glycol) provided in one of the lines of the service
loop 48. The pump 458 pumps the coolant fluid to and through the
heat exchanger 455 and then, from the heat exchanger 455, the fluid
is pumped to items below the access platform 130 for lubrication
and for cooling. The fluid that flows through the motor 459 returns
in a line back to the service loop 48 (e.g. back to a fluid
reservoir, e.g. the fluid reservoir 533, FIG. 28D). Optionally, the
fluid from the motor 459 can first go through the heat exchanger
455 then to the service loop 48. Appropriate lines with flow
controlled by the directional control valves 260 provide hydraulic
power fluid to each of the items powered thereby.
[0104] The present invention, therefore, provides in at least
certain embodiments, a drive system with a permanent magnet motor
with a first motor side, a second motor side, and a motor bore
therethrough from the first motor side to the second motor side,
the permanent magnet motor being a hollow bore alternating current
permanent magnet motor; a planetary gear system coupled to the
permanent magnet motor, the planetary gear system having a first
gear side spaced-apart from the first motor side, a second gear
side spaced-apart from the first gear side, and a gear system bore
therethrough from the first gear side to the second gear side, the
second motor side adjacent the first gear side; and the motor bore
aligned with the gear system bore so that fluid is flowable through
the drive system from the first motor side of the motor to the
second gear side of the planetary gear system.
[0105] The present invention, therefore, provides in at least
certain embodiments, a top drive system for wellbore operations,
the top drive system with a permanent magnet motor with a top, a
bottom, and a motor bore therethrough from the top to the bottom,
the permanent magnet motor being a hollow bore alternating current
permanent magnet motor; a planetary gear system coupled to the
permanent magnet motor, the planetary gear system having a top, a
bottom, and a gear system bore therethrough from top to bottom, the
bottom of the permanent magnet motor adjacent the top of the
planetary gear system; the motor bore aligned with the gear system
bore so that fluid is flowable through the top drive system from
the top of the motor to the bottom of the planetary gear system;
and a quill drivingly connected to the planetary gear system and
rotatable thereby to rotate a tubular member located below the
quill, the quill having a top end and a bottom end, the quill,
permanent magnet motor, and planetary gear system comprising a top
drive. Such a system may have one or some (in any possible
combination) of the following: a support system for supporting the
permanent magnet motor and the planetary gear system, the support
system with a swivel body below the planetary gear system, a
suspension member above the permanent magnet motor, two
spaced-apart links each with an upper end and a lower end, the
swivel body having two spaced-apart holes, each one for receiving a
lower end of one of the two supporting links, and each upper end of
one of the two spaced-apart links connected to the suspension
member; a spacer plate below and supporting the planetary gear
system, the spacer plate having a bearing recess, and a bearing in
the bearing recess for facilitating rotation of the quill; wherein
each of the two spaced-apart holes for receiving a lower end of a
link is non-circular in shape as viewed from above; wherein the
suspension member includes a block becket apparatus according to
the present invention, the block becket apparatus including a
travelling block and a becket, the becket releasably and directly
connected to the traveling block, the becket releasably connectible
to the two spaced-apart links; wherein the becket is selectively
securable to the travelling block in a plurality of positions; a
counterbalance system for compensating for system weight during
tubular stabbing to inhibit damage to tubulars, the counterbalance
system with two load compensators, each load compensator connected
at a first end to one of the two spaced-apart links and at a second
end to the swivel body; the swivel body having a swivel body
interior, a main bearing disposed within the swivel body interior,
the quill having a quill flange, the quill flange resting on and
movable over the main bearing; a load sleeve having a sleeve top
and a sleeve bottom, the sleeve top connected to the swivel body,
the sleeve bottom having a sleeve bottom portion, a load collar
positioned around the load sleeve and supported by the sleeve
bottom portion, two lower links, the two lower links supported by
the load collar, elevator apparatus for selectively receiving and
holding a tubular, the elevator apparatus supported by the two
lower links; link tilt apparatus connected to the two lower links
and to the load collar for tilting the two lower links away from a
central line extending down through a center of the permanent
magnet through a center of the planetary gear system, through a
center of the quill, said centers aligned; a mud saver system
releasably connected to the quill; a saver sub releasably connected
to and below the mud saver system; a mud saver system releasably
connected to the bottom end of the quill, a saver sub releasably
connected to and below the mud saver system, the mud saver system
having a central longitudinal axis from a top to a bottom thereof,
and a mud saver bore therethrough from top to bottom, the saver sub
having a central longitudinal axis from a top to a bottom thereof,
and a saver sub bore therethrough from top to bottom, the quill
having a central longitudinal axis and a quill bore therethrough
from the top end to the bottom end, the central longitudinal axis
of the mud saver system of the saver sub and of the quill aligned
with the center line, and the quill bore in fluid communication
with the mud saver bore and the mud saver bore in fluid
communication with the saver sub bore so that drilling fluid is
passable through the quill to the mud saver system, to the saver
sub, and out from the saver sub; a clamping system connected to the
load collar and movable up and down beneath and with respect to the
load collar, the clamping system for selectively clamping an item,
and the clamping system disposed between the two lower links;
wherein the clamping system has a main body, two opposed clamping
apparatuses in the main body, the two opposed clamping apparatuses
spaced-apart for selective receipt therebetween of a member to be
clamped therebetweeen, each of the two opposed clamping apparatuses
having a mount and a piston movable within the mount, the piston
selectively movable toward and away from a member to be clamped,
two spaced-apart legs, each leg with an upper end and a lower end,
each lower end connected to the main body, each leg comprising an
outer leg portion and an inner leg portion, the inner leg portion
having part thereof movable within the outer leg portion to provide
a range of up/down movement for the main body; each mount having a
liner channel for a liner, a liner in each mount for facilitating
piston movement, each piston movable in said liner, and each liner
removably disposed in a corresponding liner channel; wherein
clamping system support apparatus connects the clamping system to
the load collar and the top drive system includes electrical power
generating apparatus connected to the clamping system support
apparatus for providing electrical power to at least one apparatus
located below the load collar; a lower hydraulic manifold connected
to the clamping system support apparatus; a plurality of
directional control valves on the lower hydraulic manifold for
control hydraulic fluid flow in plurality of corresponding flow
lines; the plurality of corresponding flow lines including flow
lines for providing hydraulic fluid to power apparatus below the
clamping system; a selective locking mechanism secured to the
swivel body for selectively locking the clamping system preventing
its rotation while the quill is allowed to rotate; wherein the load
sleeve has fluid conducting channels and the top drive system has a
rotating head connected to the load sleeve for receiving fluid from
the load sleeve's fluid conducting channels and for conveying said
fluid to the lower hydraulic manifold, and the rotating head
rotatable with the clamping system; an access platform pivotably
connected at a lower end to the swivel body, the access platform
with a platform portion pivotable to a generally horizontal
position so that personnel on the access platform can access
components of the top drive system; an extension system connected
to the top drive for moving the top drive horizontally; wherein the
extension system has an opening through which a tubular stand is
movable while the extension system with the top drive connected
thereto moves with respect to the tubular stand; first connection
locking apparatus locks the quill to the mud saver system, and
second connection locking apparatus locks the mud saver system to
the saver sub; the two lower links are a first link and a second
link, the link tilt apparatus including a clamp on each of the
first link and the second link, each clamp having two roller pins
between which a portion of the corresponding link is movable to
facilitate movement of the links with respect to the clamps; and/or
wherein each roller is mounted with mounting plates having offset
holes for mounting the roller pins so that reversing the mounting
plates changes the distance between the roller pins to accommodate
links of different widths.
[0106] The present invention, therefore, provides in at least
certain embodiments, a top drive system with a drive motor, a gear
system coupled to the drive motor, a drive quill coupled to the
gear system, a top drive support system for supporting the drive
motor, the gear system, and the drive quill, a lower support
apparatus connected to the top drive support system, tubular
handling apparatus connected to and supported by the lower support
apparatus, the tubular handling apparatus including
hydraulic-fluid-powered apparatus, provision apparatus for
providing hydraulic fluid to power the hydraulic-fluid-powered
apparatus, the provision apparatus including flow line apparatus
for providing hydraulic fluid to the hydraulic-fluid-powered
apparatus and electrically-operable control apparatus for
controlling fluid flow to and from the flow line apparatus, and
electrical power generating apparatus connected to the tubular
handling apparatus for providing electrical power to the
electrically-operable control apparatus.
[0107] The present invention, therefore, provides in at least
certain embodiments, an apparatus for releasably holding a member,
the apparatus with a main body, two opposed clamping apparatuses in
the main body, the two opposed clamping apparatuses spaced-apart
for selective receipt therebetween of a member to be clamped
therebetweeen, each of the two opposed clamping apparatuses having
a mount and a piston movable within the mount, the piston
selectively movable toward and away from a member to be clamped,
two spaced-apart legs, each leg with an upper end and a lower end,
each lower end connected to the main body, and each leg with an
outer leg portion and an inner leg portion, the inner leg portion
having part thereof movable within the outer leg portion to provide
a range of up/down movement for the main body.
[0108] The present invention, therefore, provides in at least
certain embodiments, a containerized top drive system with a
container, top drive apparatus removably disposed within the
container, an extension system for moving the top drive apparatus
generally horizontally within a derrick, the top drive apparatus
secured to the extension system, the extension system removably
disposed within the container with the top drive apparatus, a
track, the track comprised of multiple track parts connectible
together, the track including at least one track part which is a
skid track part, the skid track part with a skid portion and a
track portion, the top drive apparatus and the extension system
located on the at least one skid track part within the container
and the top drive apparatus supported by and movable with the at
least one, skid track part, at least one first compartment for
removably storing the multiple track parts, the multiple track
parts removably located in the at least one first compartment, and
the track assembleable outside the container to include the
multiple track parts and the at least one skid track part so that
the extension system is movable along the track with the top drive
apparatus.
[0109] In conclusion, therefore, it is seen that the present
invention and the embodiments disclosed herein and those covered by
the appended claims are well adapted to carry out the objectives
and obtain the ends set forth. Certain changes can be made in the
subject matter without departing from the spirit and the scope of
this invention. It is realized that changes are possible within the
scope of this invention and it is further intended that each
element or step recited in any of the following claims is to be
understood as referring to all equivalent elements or steps. The
following claims are intended to cover the invention as broadly as
legally possible in whatever form it may be utilized. The invention
claimed herein is new and novel in accordance with 35 U.S.C. .sctn.
102 and satisfies the conditions for patentability in .sctn. 102.
The invention claimed herein is not obvious in accordance with 35
U.S.C. .sctn. 103 and satisfies the conditions for patentability in
.sctn. 103. This specification and the claims that follow are in
accordance with all of the requirements of 35 U.S.C. .sctn.
112.
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